Dogfood vira

[srid]

Replace GitHub Actions workflow with Vira for our repo's CI.

the practice of using one's own products or services https://en.wikipedia.org/wiki/Eating_your_own_dog_food

(This would also allow us to reliably run Playwright tests (#127) because they fail on github runners.)

Tasks

We would be manually triggering CI, but that's fine due to the "status" based blocking of PR merge.

• Nix modules
  • Make the NixOS module to work NixOS module: add stateDir option + vm test #135
  • Add home-manager module #142
• "Local CI" mode #96 - such that the Vira's pipeline includes one last stage that does the "signoff".

Note

Haven't included #28 here, because we can always run Vira on both the systems (hence the home-manager module being more appealing)

Stretch (but not necessary)

These are not strictly necessary for us to start dogfooding Vira (manual trigger w/ 'signoff' workflow), but they just perfect it (no manual trigger necessary).

• Auto git branch refresh #110
• GitHub integration #37
• Multi-node support #28